From: Yong Zhang Date: Tue, 29 May 2012 07:15:59 +0000 (+0800) Subject: S390: Smp: remove call to ipi_call_lock()/ipi_call_unlock() X-Git-Tag: v3.6-rc1~166^2~8 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=46ce7fbfdbe0be6aaf0e816331aac08a74a00e5a;p=pandora-kernel.git S390: Smp: remove call to ipi_call_lock()/ipi_call_unlock() ipi_call_lock/unlock() lock resp. unlock call_function.lock. This lock protects only the call_function data structure itself, but it's completely unrelated to cpu_online_mask. The mask to which the IPIs are sent is calculated before call_function.lock is taken in smp_call_function_many(), so the locking around set_cpu_online() is pointless and can be removed. [ tglx: Massaged changelog ] Signed-off-by: Yong Zhang Cc: ralf@linux-mips.org Cc: sshtylyov@mvista.com Cc: david.daney@cavium.com Cc: nikunj@linux.vnet.ibm.com Cc: paulmck@linux.vnet.ibm.com Cc: axboe@kernel.dk Cc: peterz@infradead.org Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Link: http://lkml.kernel.org/r/1338275765-3217-5-git-send-email-yong.zhang0@gmail.com Acked-by: Srivatsa S. Bhat Acked-by: Peter Zijlstra Signed-off-by: Thomas Gleixner --- Reading git-diff-tree failed